MSM548262-70JS datasheet(1/37 Pages) OKI

номер детали	MSM548262-70JS

подробное описание детали	262,144-Word x 8-Bit Multiport DRAM

PDF	37 Pages

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производитель	OKI [OKI electronic componets]

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¡ Semiconductor

MSM548262

1/37

¡ Semiconductor

MSM548262

262,144-Word

¥ 8-Bit Multiport DRAM

DESCRIPTION

The MSM548262 is a 2-Mbit CMOS multiport DRAM composed of a 262,144-word by 8-bit

dynamic RAM, and a 512-word by 8-bit SAM. Its RAM and SAM operate independently and

asynchronously.

It supports three types of operations: random access to RAM port, high speed serial access to

SAM port, and bidirectional transfer of data between any selected row in the RAM port and the

SAM port. In addition to the conventional multiport DRAM operating modes, the MSM548262

features block write, flash write functions on the RAM port and a split data transfer capability

on the SAM port. The SAM port requires no refresh operation because it uses static CMOS flip-

flops.

FEATURES

• Single power supply: 5 V

±10%

• Full TTL compatibility

• Multiport organization

RAM : 256K word ¥ 8 bits

SAM : 512 word ¥ 8 bits

• Fast page mode

• Write per bit

• Masked flash write

• Masked block write

• Package options:

40-pin 400 mil plastic SOJ

(SOJ40-P-400-1.27)

(Product : MSM548262-xxJS)

44/40-pin 400 mil plastic TSOP (Type II)(TSOPII44/40-P-400-0.80-K)(Product : MSM548262-xxTS-K)

xx indicates speed rank.

PRODUCT FAMILY

• RAS only refresh

• CAS before RAS refresh

• Hidden refresh

• Serial read/write

• 512 tap location

• Bidirectional data transfer

• Split transfer

• Masked write transfer

• Refresh: 512 cycles/8 ms

Access Time

Cycle Time

Power Dissipation

RAM

Operating

Standby

SAM

60 ns

120 ns

140 mA

8 mA

17 ns

22 ns

70 ns

140 ns

130 mA

8 mA

17 ns

22 ns

80 ns

150 ns

120 mA

8 mA

20 ns

25 ns

Family

MSM548262-60

MSM548262-70

MSM548262-80

E2L0016-17-Y1

This version: Jan. 1998

Previous version: Dec. 1996

Аналогичный номер детали - MSM548262-70JS

производитель	номер детали	датащи	подробное описание детали
OKI electronic componet...	MSM548263	392Kb / 40P	262,144-Word x 8-Bit Multiport DRAM

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Аналогичное описание - MSM548262-70JS

производитель	номер детали	датащи	подробное описание детали
OKI electronic componet...	MSM514252A	358Kb / 33P	262,144-Word x 4-Bit Multiport DRAM
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	MSM5416273	391Kb / 40P	262,144-Word x 16-Bit Multiport DRAM
	MSM5416282	367Kb / 37P	262,144-Word x 16-Bit Multiport DRAM
	MSM548263	392Kb / 40P	262,144-Word x 8-Bit Multiport DRAM
	MSM54V16272	369Kb / 39P	262,144-Word x 16-Bit Multiport DRAM
	MSM54V16282	368Kb / 39P	262,144-Word x 16-Bit Multiport DRAM
	MSM54V16283	389Kb / 42P	262,144-Word x 16-Bit Multiport DRAM

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